Hanna Instruments Australia
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Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm
Hanna Instruments Australia
Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm

Pool Line pH Checker® HC - HI779


Prices include GST. Not all items are in stock. Call 03 9769 0666 to confirm.

HI779 Pool Line pH Checker® Handheld Colorimeter (HC) bridges the gap between simple chemical test kits and professional photometric instrumentation. Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light source at a specific wavelength and a light-sensing detector to precisely determine absorbance and ion concentration. The Pool Line pH Checker® HC uses a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable price of a chemical test kit.

  • The ease of a chemical test kit without the maintenance of traditional pH meters
  • No more guessing colors
  • Simple, intuitive operation


The HI779 Pocket Colorimeter from the Pool Line Series is designed to measure pH in swimming pools, hot tubs and spas, on a scale between 6.3 and 8.6 pH. HI779 follows the same principle as chemical test kits and swimming pool litmus papers, but with one key advantage. The value is in fact determined electronically, thanks to a light source and a photodetector, which precisely detect the color produced by the reaction of the sample with phenol red. So you no longer have to guess what color the sample is to determine the pH. The instrument offers extremely greater sensitivity than the human eye and can detect pH values with resolution down to 0.1 pH.

The shape of the tool fits perfectly in the palm and pocket and the large LCD display is easy to read. The automatic shut-off function ensures long battery life.

To take a measurement, fill a cuvette with a water sample, place it in the instrument and zero the Checker®. Next, add the reagent, which will react with the hydrogen ion, causing a color change. Finally, place the vial in the Checker®, press the button and read the results. It’s that easy!

Name Pool Line pH Checker® HC - HI779
pH Range 6.3 to 8.6 pH
pH Resolution 0.1 pH
pH Accuracy ±0.2 pH of reading
pH Method Adaptation of Phenol Red Method
Photometer/Colorimeter Light Source LED @ 525 nm
Photometer/Colorimeter Light Detector silicon photocell
Battery Type/Life 1.5V AAA
Automatic Shut-Off after 10 minutes of non-use
Weight 64 g (2.3 oz.)
Dimensions 86.0 mm x 61.0 mm x 37.5mm (3.2 x 2.4 x 1.5”)

HI779 Checker HC is supplied with sample cuvettes with caps (2 pcs.), pH starter reagent kit, 1.5VAAA battery (1 pc.), and instruction manual packaged in a plastic carrying case.

All prices are inclusive of GST and not all items are stock items, if you require an immediate solution please send an email to sales@hannainst.com.au or call us on (03) 9769 0666.

Free standard delivery: We offer free delivery within Australia on orders over $100, typically arriving within 5 to 7 days. Delivery times may vary depending on the courier service and the recipient's location. Free shipping is not available with other offers or discounts.

Same-day despatch: Place your order before 1 PM Monday to Friday for same-day despatch. Delivery times may vary depending on the courier service and the recipient's location. Subject to stock availability.

Please note that we do not offer shipping to PO Box addresses.

Additional information

Weight 0.45 kg


pH Accuracy

±0.2 pH of reading